Installation guide

Elements of Network Planning

890 USE 100 00

2.2.5 Modbus Plus Network Grounding

Each tap has a grounding screw for connection to the site panel ground.

Modicon drop cables have a grounding lug in the cable package. This

must be installed on the cable and connected to the grounding screw on

the tap.

The node device end of the drop cable has a lug which must be

connected to the node device’s panel ground. The network cable must

be grounded through this connection at each node site, even when the

node device is not present. The ground point must not be left open. No

other grounding method can be used.

For a full description of Modicon controller system grounding

requirements, refer to the documents listed in the Related Publications

section of this guide.